Match these definitions with either of the four Vs to describe Big Data: LO $10-1,$

$1.$ Unstructured and unprocessed data, such as comments in social media, emails, global positioning system measurements, etc.

$2.$ The massive amount of streaming data involved

$3.$ Data coming in at fast speeds or in real time, such as streaming videos and news feeds

$4.$ Opinions or facts

$5.$ Data with a lot of missing observations

$6.$ Stock market data that updates every $5$ seconds

$7.$ Financial statement data that appears in tables

$8.$ All Twitter data from $2021$

a$.$ volume

b$.$ velocity

c$.$ variety

d$.$ veracity